{"id":"CVE-2026-121105","kind":"vulnerability","aliases":["CVE-2026-121105"],"related":[],"title":"Chrome: network flaw lets a crafted web page read cross-origin data","description":"Information leak in Network in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)","summary":"A flaw in the Network component of Google Chrome before 157.0.8103.38 lets a remote attacker obtain data from other origins through a crafted HTML page. An attacker who lures a user to such a page can read information that should be isolated from it.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime"],"not_affected_if":["auto-updated-browser"],"how_to_check":"- Check the Chrome version in Chrome's About page (chrome://settings/help) or run `google-chrome --version` on Linux\n- Compare the installed version against `157.0.8103.38`","fix":"- Google Chrome: `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:16+00:00","first_seen_at":"2026-11-03T21:19:14+00:00","triaged_at":"2026-11-03T21:25:14+00:00","updated_at":"2026-11-03T21:25:14+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:25:14Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.38` or later","reach":"internet","title":"Chrome: network flaw lets a crafted web page read cross-origin data","impact":"medium","summary":"A flaw in the Network component of Google Chrome before 157.0.8103.38 lets a remote attacker obtain data from other origins through a crafted HTML page. An attacker who lures a user to such a page can read information that should be isolated from it.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","desktop","browser"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Cross-origin data from other sites readable by a malicious page","analyst_note":"","how_to_check":"- Check the Chrome version in Chrome's About page (chrome://settings/help) or run `google-chrome --version` on Linux\n- Compare the installed version against `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later through its built-in update check.","needs_analyst":false,"not_affected_if":["auto-updated-browser"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 who visits untrusted web pages. Managed browsers that auto-update are likely already patched once the update lands; the risk sits with unpatched desktop installs.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000664,"input_tokens":4095,"output_tokens":509,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121105':16A,19A '-2026':15A,18A '157.0.8103.38':34B,75C 'allow':76C 'attack':38B,50B,79C 'browser':20B 'chrome':1A,21B,32B,72C 'chromium':91C 'compon':29B 'craft':6A,46B,88C 'cross':11A,83C 'cross-origin':10A,82C 'cve':14A,17A 'data':13A,40B,85C 'desktop':22B 'flaw':3A,25B 'googl':31B,71C 'html':47B,89C 'inform':61B,66C 'isol':65B 'leak':67C 'let':4A,35B 'lure':52B 'medium':94C 'network':2A,28B,69C 'obtain':39B,81C 'origin':12A,43B,84C 'page':8A,48B,58B,90C 'prior':73C 'read':9A,60B 'remot':37B,78C 'runtim':23B 'secur':92C 'sever':93C 'user':54B 'via':86C 'web':7A","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 who visits untrusted web pages. Managed browsers that auto-update are likely already patched once the update lands; the risk sits with unpatched desktop installs.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later through its built-in update check.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","medium","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:16+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121105","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121105","severity":null,"published_at":"2026-11-03T21:17:16+00:00","modified_at":"2026-11-03T21:17:16+00:00","first_seen_at":"2026-11-03T21:19:14+00:00","fetched_at":"2026-11-03T21:19:14+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}